Chipset: Bluestrum AB5656C
Driver Size: Φ13mm ，32Ω/25MW
Frequency Range: 20Hz-20KHZ
Transmission Distance: 10m
Bluetooth Version: 5.4V
Speaker sensitivity: 105+/-3dB (1Khz)
Supporting protocols: A2DP, AVRCP, HSP, HFP
Decoding method: SBC, AAC
Battery Capacity: 50mAh for earbuds, 400mAh for charging case 
Playing Music Time : up to 6 hrs
Charging Time: around 1.5 hours for earbuds, 3 hours for charging case 
Charging port:  USB-C
Charging case size :81x27.5x35mm